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1. How many levels are there in a single-factor independent-measures design comparing depression scores of participants with and without treatment? a. 1 b. 2 c.

1. How many levels are there in a single-factor independent-measures design comparing depression scores of participants with and without treatment?

a. 1

b. 2

c. 3

d. 4

2. When is the distinction between the "testwise" alpha level and the "experimentwise" alpha level important?

a. Whenever you do an analysis of variance

b. When the study is comparing exactly two treatments

c. When the study is comparing more than two treatments

d. Only when there are fewer than 30 scores in each treatment

3. Which of the following accurately describes the F-ratio in an analysis of variance?

a. The F-ratio is a ratio of two (or more) sample means.

b. The F-ratio is a ratio of two variances.

c. The F-ratio is a ratio of sample means divided by sample variances.

d. None of the above.

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